Pixel Circuit for AC Driving, Driving Method and Display Apparatus

1. A pixel circuit for AC driving comprising: a capacitor, a first voltage input unit, a second voltage input unit, a data signal input unit, a first light emitting unit, a second light emitting unit and a light emitting control unit; wherein the first light emitting unit is configured to emit light under the control of a driving control terminal, a first light emitting control terminal, a first voltage input terminal and a second voltage input terminal; the second light emitting unit is configured to emit light under the control of the driving control terminal, a second light emitting control terminal, the first voltage input terminal and the second voltage input terminal; wherein the first light emitting unit emits light during a preset first time period and the second light emitting unit emits light during a preset second time period; the first voltage input unit is configured to supply a first input voltage at a first voltage terminal to the first light emitting unit and the second light emitting unit under the control of a first scan terminal; the second voltage input unit is configured to supply a second input voltage at a second voltage terminal to the first light emitting unit and the second light emitting unit under the control of the first scan terminal; the data signal input unit is configured to supply a data line signal to the first voltage input terminal through a data line under the control of a second scan terminal; the light emitting control unit is configured to make the first light emitting unit or the second light emitting unit emit light by aid of the driving control terminal, the first light emitting control terminal and the second light emitting control terminal under the control of a third scan terminal; a first electrode of the capacitor is connected to the first voltage terminal and a second electrode of the capacitor is connected to the driving control terminal.

2. The pixel circuit of claim 1 , wherein the first light emitting unit comprises a first driving transistor and a first light emitting diode; wherein the first driving transistor has a gate connected to the driving control terminal, a source connected to the first voltage input terminal and a drain connected to the first light emitting control terminal; the first light emitting diode has a first electrode connected to the first light emitting control terminal and a second electrode connected to the second voltage input terminal; the second light emitting unit comprises a second driving transistor and a second light emitting diode, wherein the second driving transistor has a gate connected to the driving control terminal, a source connected to the first voltage input terminal and a drain connected to the second light emitting control terminal; the second light emitting diode has a first electrode connected to the second voltage input terminal and a second electrode connected to the second light emitting control terminal; the first driving transistor and the second driving transistor are of different types.

3. The pixel circuit of claim 1 , wherein the light emitting control unit comprises a third switching transistor having a gate connected to the third scan terminal, a source connected to the driving control terminal, and a drain connected to the first light emitting control terminal and the second light emitting control terminal; or the light emitting control unit comprises a third switching transistor and a fifth switching transistor, the third switching transistor has a gate connected to the third scan terminal, a source connected to the driving control terminal and a drain connected to the first light emitting control terminal, and the fifth switching transistor has a gate connected to the third scan terminal, a source connected to the driving control terminal and a drain connected to the second light emitting control terminal.

4. The pixel circuit of claim 1 , wherein the first voltage input unit comprises a first switching transistor having a gate connected to the first scan terminal, a source connected to the first voltage terminal, and a drain connected to the first voltage input terminal.

5. The pixel circuit of claim 1 , wherein the data signal input unit comprises a second switching transistor having a gate connected to the second scan terminal, a source connected to the data line, and a drain connected to the first voltage input terminal.

6. The pixel circuit of claim 1 , wherein the second voltage input unit comprises a fourth switching transistor having a gate connected to the first scan terminal, a source connected to the second voltage terminal, and a drain connected to the second voltage input terminal.

7. The pixel circuit of claim 1 , wherein the first light emitting unit emits light during a preset high level period supplied at the first voltage terminal and during a preset low level period supplied at the second voltage terminal, and the second light emitting unit emits light during a preset low level period supplied at the first voltage terminal and during a preset high level period supplied at the second voltage terminal.

8. A display apparatus comprising a pixel circuit for AC driving, wherein the pixel circuit comprises: a capacitor, a first voltage input unit, a second voltage input unit, a data signal input unit, a first light emitting unit, a second light emitting unit and a light emitting control unit; wherein the first light emitting unit is configured to emit light under the control of a driving control terminal, a first light emitting control terminal, a first voltage input terminal and a second voltage input terminal; the second light emitting unit is configured to emit light under the control of the driving control terminal, a second light emitting control terminal, the first voltage input terminal and the second voltage input terminal; wherein the first light emitting unit emits light during a preset first time period and the second light emitting unit emits light during a preset second time period; the first voltage input unit is configured to supply a first input voltage at a first voltage terminal to the first light emitting unit and the second light emitting unit under the control of a first scan terminal; the second voltage input unit is configured to supply a second input voltage at a second voltage terminal to the first light emitting unit and the second light emitting unit under the control of the first scan terminal; the data signal input unit is configured to supply a data line signal to the first voltage input terminal through a data line under the control of a second scan terminal; the light emitting control unit is configured to make the first light emitting unit or the second light emitting unit emit light by aid of the driving control terminal, the first light emitting control terminal and the second light emitting control terminal under the control of a third scan terminal; a first electrode of the capacitor is connected to the first voltage terminal and a second electrode of the capacitor is connected to the driving control terminal.

9. The display apparatus of claim 8 , wherein the first light emitting unit comprises a first driving transistor and a first light emitting diode; wherein the first driving transistor has a gate connected to the driving control terminal, a source connected to the first voltage input terminal and a drain connected to the first light emitting control terminal; the first light emitting diode has a first electrode connected to the first light emitting control terminal and a second electrode connected to the second voltage input terminal; the second light emitting unit comprises a second driving transistor and a second light emitting diode, wherein the second driving transistor has a gate connected to the driving control terminal, a source connected to the first voltage input terminal and a drain connected to the second light emitting control terminal; the second light emitting diode has a first electrode connected to the second voltage input terminal and a second electrode connected to the second light emitting control terminal; the first driving transistor and the second driving transistor are of different types.

10. The display apparatus of claim 8 , wherein the light emitting control unit comprises a third switching transistor having a gate connected to the third scan terminal, a source connected to the driving control terminal, and a drain connected to the first light emitting control terminal and the second light emitting control terminal; or the light emitting control unit comprises a third switching transistor and a fifth switching transistor, the third switching transistor has a gate connected to the third scan terminal, a source connected to the driving control terminal and a drain connected to the first light emitting control terminal, and the fifth switching transistor has a gate connected to the third scan terminal, a source connected to the driving control terminal and a drain connected to the second light emitting control terminal.

11. The display apparatus of claim 8 , wherein the first voltage input unit comprises a first switching transistor having a gate connected to the first scan terminal, a source connected to the first voltage terminal, and a drain connected to the first voltage input terminal.

12. The display apparatus of claim 8 , wherein the data signal input unit comprises a second switching transistor having a gate connected to the second scan terminal, a source connected to the data line, and a drain connected to the first voltage input terminal.

13. The display apparatus of claim 8 , wherein the second voltage input unit comprises a fourth switching transistor having a gate connected to the first scan terminal, a source connected to the second voltage terminal, and a drain connected to the second voltage input terminal.

14. The display apparatus of claim 8 , wherein the first light emitting unit emits light during a preset high level period supplied at the first voltage terminal and during a preset low level period supplied at the second voltage terminal, and the second light emitting unit emits light during a preset low level period supplied at the first voltage terminal and during a preset high level period supplied at the second voltage terminal.

15. A driving method of pixel circuit comprising: during a first stage, controlling a first voltage input unit and a second voltage input unit to operate by aid of a first scan terminal such that a first voltage input terminal is connected to a first voltage terminal and a second voltage input terminal is connected to a second voltage terminal, controlling a data signal input unit to operate by aid of a second scan terminal and controlling a light emitting control unit to operate by aid of a third scan terminal such that voltage at a driving control terminal is reset; during a second stage, controlling the first voltage input unit and the second voltage input unit to close by aid of the first scan terminal, controlling the data signal input unit to operate by aid of the second scan terminal and controlling the light emitting control unit to operate by aid of the third scan terminal such that a capacitor is charged by a data line; during a third stage, controlling the first voltage input unit and the second voltage input unit to close by aid of the first scan terminal, controlling the data signal input unit to close by aid of the second scan terminal and controlling the light emitting control unit to operate by aid of the third scan terminal; during a fourth stage, controlling the first voltage input unit and the second voltage input unit to operate by aid of the first scan terminal, controlling the data signal input unit to close by aid of the second scan terminal and controlling the light emitting control unit to close by aid of the third scan terminal such that a first light emitting unit is driven to emit light by aid of the driving control terminal, a first light emitting control terminal, the first voltage input terminal and the second voltage input terminal; during a fifth stage, controlling the first voltage input unit and the second voltage input unit to operate by aid of the first scan terminal such that the first voltage input terminal is connected to the first voltage terminal and the second voltage input terminal is connected to the second voltage terminal, controlling the data signal input unit to operate by aid of the second scan terminal and controlling the light emitting control unit to operate by aid of the third scan terminal such that the voltage at the driving control terminal is reset; during a sixth stage, controlling the first voltage input unit and the second voltage input unit to close by aid of the first scan terminal, controlling the data signal input unit to operate by aid of the second scan terminal and controlling the light emitting control unit to operate by aid of the third scan terminal such that the capacitor is charged by the data line; during a seventh stage, controlling the first voltage input unit and the second voltage input unit to close by aid of the first scan terminal, controlling the data signal input unit to close by aid of the second scan terminal and controlling the light emitting control unit to operate by aid of the third scan terminal; and during an eighth stage, controlling the first voltage input unit and the second voltage input unit to operate by aid of the first scan terminal, controlling the data signal input unit to close by aid of the second scan terminal and controlling the light emitting control unit to close by aid of the third scan terminal such that a second light emitting unit is driven to emit light by aid of the driving control terminal, a second light emitting control terminal, the first voltage input terminal and the second voltage input terminal.

16. The driving method of claim 15 , wherein during the first stage, a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor and a first driving transistor are turned on, and a second driving transistor is turned off; during the second stage, the first switching transistor, the fourth switching transistor and the second driving transistor are turned off, and the second switching transistor, the third switching transistor and the first driving transistor are turned on; during the third stage, the first switching transistor, the second switching transistor, the third switching transistor and the fourth switching transistor are turned off, and the first driving transistor and the second driving transistor are turned off; during the fourth stage, the first switching transistor, the fourth switching transistor and the first driving transistor are turned on, and the second switching transistor, the third switching transistor and the second driving transistor are turned off; during the fifth stage, the first switching transistor, the second switching transistor, the third switching transistor, the fourth switching transistor and the second driving transistor are turned on, and the first driving transistor is turned off; during the sixth stage, the first switching transistor, the fourth switching transistor and the first driving transistor are turned off, and the second switching transistor, the third switching transistor and the second driving transistor are turned on; during the seventh stage, the first switching transistor, the second switching transistor, the third switching transistor and the fourth switching transistor are turned off, and the first driving transistor and the second driving transistor are turned off; and during the eighth stage, the first switching transistor, the fourth switching transistor and the second driving transistor are turned on, and the second switching transistor, the third switching transistor and the first driving transistor are turned off.

17. The driving method of claim 16 , further comprising: during the first stage, turning on the fifth switching transistor; during the second stage, turning on the fifth switching transistor; during the third stage, turning off the fifth switching transistor; during the fourth stage, turning off the fifth switching transistor; during the fifth stage, turning on the fifth switching transistor; during the sixth stage, turning on the fifth switching transistor; during the seventh stage, turning off the fifth switching transistor; and during the eighth stage, turning off the fifth switching transistor.